Gorgan Persian: گرگان Esterabad
City
Gorgan Tower, Gorgan Mosque, Gorgan Palace, Roundabout
Gorgan
Coordinates: 36°50′16″N 54°26′29″E / 36.83778°N 54.44139°E / 36.83778; 54.44139[1]
Country	Iran
Province	Golestan
County	Gorgan
District	Central
Government
• Mayor	Mohammad Reza Seyed Alangi[2]
• City Council Chairperson	Isa Mehri[3]
Area
• Total	64 km2 (24 sq mi)
Elevation	155 m (509 ft)
Population  (2016)[4]
• Total	350,676
• Density	5,500/km2 (15,000/sq mi)
Time zone	UTC+03:30 (IRST)
Climate	Csa
Gorgan at GEOnet Names Server

Gorgan (Persian: گرگان; [ɡoɾˈɡɒːn] ^ⓘ)^[a] is a city in the Central District of Gorgan County, Golestan province, Iran, serving as capital of the province, the county,^[6] and the district.^[7] It lies approximately 400 km (250 mi) to the northeast of the national capital Tehran, and some 30 km (19 mi) away from the Caspian Sea.

There are several archaeological sites near Gorgan, including Tureng Tepe and Shah Tepe, in which remains dating from the Neolithic and Chalcolithic eras. Some other important Neolithic sites in the area are Yarim Tepe, and Sange Chaxmaq. The nearby Shahroud Plain has many such sites. More than 50 are on the Gorgan Plain.^[8]

According to the Greek historian Arrian, Zadracarta was the largest city of Hyrcania and the site of the "royal palace".^[9] The term means "the yellow city", and it was given to it from the great number of oranges, lemons, and other fruit trees which grew in the outskirts of that city.^[10]

Hyrcania became part of the Achaemenid Empire during the reign of Cyrus the Great (559–530 BC), its founder, or his successor Cambyses (530-522 BC).

The Great Wall of Gorgan, the second biggest defensive wall in the world, was built in the Parthian and Sasanian periods.

At the time of the Sasanians, "Gurgan" appeared as the name of a city, province capital, and province.^[11]

Gorgan maintained its independence as a Zoroastrian state even after Persia was conquered by the Muslim Arabs in the 7th century.

In 1210, the city was invaded and sacked by the army of Kingdom of Georgia under command of the brothers Mkhargrdzeli.^[12][13]

"Old Gorgan" was destroyed during the Mongol invasion in the 13th century, and the center of the region was moved to what was called "Astarabad", which is currently called "Gorgan".

Gorgan with its surrounding regions was sometimes considered part of the Tabaristan region.

Astarabad was an important political and religious city during the Qajar era.

At the time of the 2006 National Census, the city's population was 269,226 in 73,702 households.^[14] The following census in 2011 counted 329,536 people in 98,019 households.^[15] The 2016 census measured the population of the city as 350,676 people in 111,099 households.^[4]

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The wide Dasht-e Gorgan (Plains of Gorgan) is located north of the city and geographically bounded by 37°00' - 37°30' north latitude and 54°00' - 54°30' east longitude, covering an area of about 170 square kilometres (66 sq mi).

Some 150 km (93 mi) east of Gorgan is the Golestan National Park, home to a large portion of the fauna of Iran.

Gorgān Dam is situated 60 km northeast of Gorgan city and has a capacity of 100 million cubic meters.^[16]

Gorgan has a subtropical mediterranean climate (Köppen: Csa, Trewartha: Cs), with hot, humid summers and cool, wet winters. In general, Golestan has a moderate and humid climate known as "the moderate Caspian climate". The effective factors behind such a climate are Alborz mountain range, the direction of the mountains, the height of the area, the neighborhood to the sea, vegetation surface, local winds, altitude, and weather fronts. As a result of the above factors, three different climates exist in the region: plain moderate, mountainous, and semi-arid. Gorgan valley has a semi-arid climate. The average annual temperature is 17.8 °C (64.0 °F).

The annual precipitation is roughly 584 millimetres (23.0 in), and usually does not exceed 700 millimetres (28 in) or dip below 350 millimetres (14 in). The driest year on record was 1953 with only 182.7 millimetres (7.19 in) of precipitation, while the wettest year was 1959 with 1,579.9 millimetres (62.20 in).^[17]

Highest recorded temperature:46.2 °C (115.2 °F)

Lowest recorded temperature:−11.8 °C (10.8 °F) on 7 January 2008.^[18]